Mixing trough



Jan. 11 1927. 1,614,436

A. E. TUTTLE MIXING TROUGH Filed April 5, 1926 2 Sheets-Sheet 1liwentor: Alberblil'uliifl,

Jan. 11,1927. I

A. E. TUTTLE MIXING THOUGH Filed April 5, 1926 2 Sheets-Sheet 2 A- E i930.;

InvenZor: ilb er; E. Tullle, by flQ Patented Jan. 11 1927.

ALBEBLT E. TUTTLE, OF BOSTON, MASSACHUSETTS.

MIXING THOUGH.

Application filed. April 3, 1926. Serial No. 99,483.

This invention relates to mixing troughs in which hair is adapted to beblown into lime putty in a fluid state during the process ofmanufacturing plaster or mortar.

6 The object of the invention is to provide means for preventing thehair entering the trough from winding around the mixing shaft orclogging the mixing blades while the two ingredients, lime putty andhair, are

it being mixed and conveyed endwise of the trough to be delivered to amixing receptacle where a third ingredient such as sand is to be addedto the mixture.

This object is attained by the mechanism illustrated in the accompanyingdrawings.

For the purpose of illustrating the invention, one preferred formthereof is illustrated in the drawings, this form having been found togive satisfactory and reliable results, although it is to be understoodthat the various instrnmentalities of which the invention consists canbe variously arranged and organized, and the invention is not limited tothe precise arrangement andorganization of these instrumentalities asherein shown and described except as required by the scope of theappended claims.

Of the drawings: Figure 1 represents a plan of an apparatus for makingplaster and mortar and including a mixing trough embodying theprinciples of the present invention.

Figure 2 represents a vertical section of the mixing trough on line 2,2, on Fig. 1. as; Figure 3 represents a plan of the stirring and mixingelement of said trough, and

Figure 4 represents an elevation of one of the helical blades prior toits being curved and mounted upon the rotary cylinder of the mixingtrough.

Similar characters indicate like parts throughout the several figures ofthe drawings.

In the drawings 10 is a delivery pipe from which lime putty in a fluidstate may be ejected down a chute 11 into one end of a mixing trough 12.

A hair shredding machine 13 GJGCtS a supply of hair through a conduitinto said trough 12 at a point intermediate its ends.

The opposite or delivery end of the trough 12 communicates with a mixingreceptacle 14: to which sand is delivered from a hopper 15 by means ofan endless apron 16.

These various mechanisms form no part of the present invention andtherefore need no detailed description.

Heretofore, in mixing troughs where shredded hair is blown into the limeputty the hair becomes wound around the mixer shaft, gathers in bunches,and otherwise clogs up the mixing devices.

This is very objectionable as must be quite obvious and the presentinvention is entirely for the means to overcome these. difficulties.

To accomplish this desired result the usual mixer shaft 17 has mountedthereon collars 18 disposed within the opposite ends of a cylinder 19having inclined blades 20 radiating therefrom,

The shaft 1? is mounted in bearings at the ends of the mixing trough 12and is rotated by the same means that actuates the endless apron 16.

The circumference of the cylinder 19 is twice as great as the length ofany hair discl'larged into the trough. As a consequence of making thecylinder of large diameter and great circumference, no hair admitted tothe lime putty can possibly be wound around the cylinder.

By this means this difficulty is overcome and the hair will not becomelod ed between the various stirring blades thereby preventing the properoperation of the mixing elements.

Generally, blades and pins have been used to stir the mixture, thesemembers having straight sides and the hair has been quite apt to windaround these elements and collect in bunches, instead of becomingseparated throughout the mass of lime putty as is desired. I

In the present mixing trough the inclined lades 20 project from theperiphery of the cylinder 19, substantially in the form of aninterrupted helix, said blades being of sheet metal and welded orotherwise secured to the metal cylinder 19.

As a consequence when the shaft 17 is 100 rotated in the direction ofarrow at on Fig. 2 of the drawings, the blades 20 will cut through thecontents of the trough and force the material toward the delivery end ofthe trough owing to the inclination of said 105 blades.

The edge of each blade 20 gradually increases in height from the forwardend 21 to the rear end 22 thereof. As a consequence of this gradualincrease in height of the 110 I perfect mixture of these blades 20, nohair can collect around the edge thereof, for as the shaft 17 continuesto rotate any hair in front of the edge of a blade 20 will be carriedoutwardly thereby away from the axis of said shaft.

This results in all the hair being separated and moved outwardly in adirection where in separated condition it will commingle with the limeputty, thereby producing a two ingredients as it is delivered into themixing receptacle let to befurther mixed with sand added to the mixture.

This is of great advantage as otherwise a veryinferior product will beobtained in which masses of hair will be scattered in spots with otherportions of the product entirely devoid of the necessary bindingmaterial,

Such inferior product can only be sold at great. loss.

Moreover, by applicants construction there canbc no hair winding aroundthe shaft or clogging the mixing blades thereby preventing the freerotation of the shaft.

It is believed that the operation and many advantages of the inventionwill be fully understood without further description.

Having thus described my invention, I claim 1. In a mixing troughadapted to receive lime putty in a fluid state at one end thereof anddeliver it from the opposite end, said trough being associated withmeans for blowing short lengths of shredded hair into said trough; arotatable member extending lengthwise of said trough; and a plurality ofblades radiating from said member and inclined to the axis thereof, andall having their forward edges gradually increasing in height. l

2. In a mixing trough adapted to receive lime putty in a fluid stateatone end thereof and deliver it from the opposite end said trough beingassociated with means for blowing short lengths of shredded hair intosaid trough; a rotatable member extending lengthwise of said trough; anda plurality ofblades radiating from saidvmernber and inclined to theaxis thereof, and all having their forward edges tangential to theperiphery'of said member and gradually increasing in height."

3. In a mixing trough adapted to receive lime putty in a fluid state atone end thereof and deliver it from the opposite end, said trough beingassociated with means for blowing short lengths of shredded'hair intosaid trough; a rotatable member extending lengthwise of said trough; anda plurality of thin blades radiating from said member with their basessecured directly thereto at an inclination to the axis thereof, and allhaving their forward edges gradually in creasing in height.

41in a mixing trough adapted to receive lime putty in a fluid state atone end thereof and deliver it from the opposite end, said trough beingassociated with means for blowing short lengths of shredded hair intosaid trough; a rotatable member extending lengthwise of said trough andhaving a circumference mcre than twice the length of any hair blown intosaid trough; and a plurality of blades radiating from said member andinclined to the axis thereof and all hav ing their forward edgesgradually increasing in height.

5. In. a mixing trough adapted to receive lime putty in a fluid state atone end thereof and deliver it from the opposite end, said trough beingassociated with means for blowing short lengths of shredded hair intosaid trough; a rotatable member extending lengthwise of said trough; anda plurality of blades radiating from said member and inclined to theaxis thereof, said blades being disposed in two rows on opposite sidesof said member and all having their forward edges gradually increasingin height.

6. in a mixing trough adapted to receive lime putty in a fluid state atone end thereof and deliver it from the opposite end, said trough beingassociated with means for blowing short lengths of shredded hair intosaid trough; a rotatable member extending lengthwise of said trough; anda plurality of blades radiating from said member and inclined to theaxis thereof, and all having their forward edges gradually increasing inheight, said blades being disposed. in two rows on opposite sides ofsaid member, and the blades of one row being intermediate the blades ofthe other row.

7 In a mixing trough adapted to receive lime putty in a fluid state atone end thereof and deliver it from the opposite end, said trough beingassociated with means for blowing short lengths of shredded hair intosaid trough; a rotatable member extending lengthwise of said troughconsisting of a cylinder closed at both ends mounted upor and rotatablewith a central shaft; and a plurality of blades radiating from saidmember and inclined to the axis thereof, said blades being disposed intwo rows on opposite sides of said member and all having their forwardedges gradually increasing in height.

Signed by me at 746 Old South Bldg, Boston, Mass, this 31st day ofMarch, 1926.

ALBERT E. TUTTLE.

